Technics SL-PS740A - Page 18

SL-PS740A SL-PS740A
10
11
12
13
14
15
16
17
| E | POWER SUPPLY CIRCUIT
- 33.3¥.
8
A
012,14
Q31
D
2SC33!
1QRSTA
2SAIZO09QRSTA
POWER SUPPLY/STABILIZER POWER SUPPLY
Cc
< IcPl,2
a
ae
Quis
.
ICPILI2
10.5v
Q31
10.7
SRUN38T
e
ag
2SAIZO9ORSTA
ave?
33h)
SRUNIST
—_(i0.3v)
=
on
POWER
SUPPLY
/
«
)
zo
a
STABILIZER
LY
6
son
;
=
dja
z Aoi R23
MA4IGOMTA 2.2K
iss254Ta 10K
42.1
AQ 16!-41.3v)
38
1SS254TA
LM2940T5M
REGULATOR
O16
e ro DII~14, 31~34
2sBi2380sTve 35>
6
1O3-E
Qi3
Q13, 15, 33,34 032
2SAIZ09QRSTA OTCI24ESTP
POWER SUPPLY / STABILIZER POWER SUPPLY CONT.
REGULATOR
Q20!1
“(fey
as
SYNCHRO
EoIT
Qait 9809
OTAII4ESTP OTAI24ESTP
MUTING CONT. MUTING CONT.
Qest 1ce7l PLAY (tkHz,0d8
2SC331 1QRSTA BA4560N INE 10.4Vv
1201 i
POWER SUPPLY ' HEADPHONES AMP P-P
ITCI24ESTP
8.6V.
VR67I:
CENTER
WITCHING
ces!
R887
SYNCHRO
EDIT)
'ovi0oo
68
H
6.3V470
(PHONES
R875 100K
C879 0.0!
id
ox
«oO
>2
DTCI24ESTP :
isa a ee ee ee
QS!
2S¢331 1ORSTA
oe
ox ig
oe RESET SIGNAL Kx
3s
BERE
RAPS
28
se
ReBB
68
. ~ TeV
DIGITAL GND871 2 , 9871, 872
(OPTICAL
OUT)
()
0002,693
2SD0!1450RSTTA
2SAIZ090RSTA
MUTING
POWER
SUPPLY/
STABILI
R
TOTXI7T4-A
OPTICAL
TRANSMISSION MODULE
Ra29 4
100 |
4d Re3l R835:
| 330 3K
2801 soT
IN6474E
IGITAL FILTER
O/A CONVERTER
IM
42V
O)
L
ch
P-P
pao
Re
-o
1
oe
F916.9344Mer
rr
reo7
L803
TOS
43k
*
as
SO
Af
Hehe
Bos
:
7
Pa
gy
:
mo
:
:
;
”
9
pso2
PLAY
our
aii
1SS254TA
6v
Cc
D
P-P
R806
L802
tkHz,
O68
2.2 4704
camel
hs
(ne
ie”
i
See
eee
Se
ae
nO;
Sy
ae
a
ea:
Od
>
SO
1
VC
hdc:
(0
ED
Soe
nee
Conroe
O)
Reh
fe]
ov
RO36
|
Bx
Ss
Ts
23ys.
PLAY
Oa
33K
es
T88
toPey
oe
=
6v
an
:
0a0s
NM
MW
ee
ne
Ke”
18S254TAl
p33
e6aamns
thie,
098
ox
W
at
PLAY
™
PAV
ANse
1c
802
~06V
e808
801,802
i
~
T6V.
tkHz,
Od8
bw,
EM
GOSM
GS)
5)
2SC331
IORSTA
1€805
0803,
804
0805,
806
(7
De-
EMPHASIS
BA4560FTI
2SD1450RSTTA
2SC331
1ORSTA
W
P
DRIVE
CLASS
AA
AMP
MUTING
ZERO
DETECTOR
Re6!
ov
(C603,
804
FLAY.
ik
6Vv
BA4S60FTI
x
cor
L.P.F./
BUFFER
AMP
IVI.
ed
os
thir,
048
0807
asoe
OTAI24ESTP
OTAI24ESTP
ZERO DETECTOR DE- EMPHASIS AMP
-21-
-22-
18 19
A A
| a foe
(29: 240V
AFt 50 /60Hz
TIOOMA
33pH
JKB7I
HEAOPHONES
PLAY IkHz,0d8
tov
P-P
VRB7I: CENTER
Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
ePut a conductive mat on the work table.
©Do not touch the pins of IC or LSI with fingers directly.